Struggling to Work for Financial Freedom

I don’t know what to do. My family is struggling financially. I’m applying for jobs and stuff so I can pay like $100 in rent to ease the pain a little. And to buy myself frivolous stuff so my family won’t have to. The thing is every time I’ve had a job it’s taken a huge toll on my physical health and my mental health. I’ve applied for a few life guard jobs bc that’s what I’m good at. So I’m confident that when I get an interview I will be hired. I also know that I would probably only work for a few months before I’m totally broken inside and out again. My last lifeguard gig was at an indoor waterpark that lasted 5 months. It was honestly some of the best times in my life. I just don’t know if my body or my mind can take getting a job. I don’t know what to say to my parents, if anything at all. I want my own money, I want the freedom, I want to pitch in, but I’m so terrified of what will become of me once I start working.